Check, measure, and identify leaks with diagnostic equipment.
Repair or replace damaged, disconnected, or undersized ducts.
Straighten out flexible ducts that are tangled or crushed.
Seal leaks and connections with mastic, metal tape, or an aerosol based sealant. Duct tape should never be used because it will not last. Test airflow after sealing ducts.
Seal all registers and grills tightly to the ducts.
Insulate ducts in unconditioned areas, like attics and crawl spaces, with duct insulation that carries an R-value of 6 or higher.
Include a new filter as part of any duct system improvements.
Conduct a Combustion Safety Test after ducts are sealed to ensure there is no back-drafting of gas or oil-burning appliances.
Make sure you ventilate the premises regularly to reduce indoor pollution.
Working with a Heating and Cooling Contractor
Whether you want to schedule an annual equipment maintenance check-up or you've decided that you need to purchase and have new heating or cooling equipment installed, you will need to hire a contractor.
The following sections will help you find the right contractor, get quality and value from the contractor and your new equipment, and get a signed agreement on the work to be done. Many of the following recommendations also apply if you choose to work with a contractor to make other home improvements such as home sealing or duct work.
How do you choose the right contractor?
A reputable contractor should:
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